Why it works: Potato and lemon are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 2,230 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Potato Biscuits
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the flour
Bake the potatoes until done.
Burst them open and scoop out the insides to measure ¼ pound of flour.
Pass the flour through a fine sieve.
Make the batter
Mix the sieved flour with the beaten yolks of 8 eggs, grated lemon peel, and powdered sugar. Beat the mixture until light.
Fold in the beaten egg whites.
Bake
Oil small paper cases.
Fill the paper cases halfway with the batter. Sprinkle a little coarse sugar on top.
Bake in a moderate oven at 350°F (175°C) for about 20 minutes.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Potato + lemontop 12% of all pairsSmell alikemoderateCooked together2,230 recipes
Shared aroma: 2-nonenal (fatty, green).
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Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Potato + flourtop 15% of all pairsSmell alikemoderateCooked together5,355 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and egg barely smell alike, yet cooks put them together in 106,462 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Provide the flour-like starch that gives the biscuits their body and soft crumb.
- Eggs
- Yolks enrich and bind the batter, while whipped whites lighten it and help it rise in the oven.
- Powdered sugar
- Sweetens the batter and dissolves smoothly into the mixture for a fine, even crumb.
- Lemon peel
- Adds aromatic oil that gives a bright, fresh flavour to the biscuits.
The step that matters
Fold in the beaten egg whites. Folding gently keeps the air beaten into the whites, which is what lightens the batter and helps the biscuits rise. Stirring hard would knock that air out and leave them dense.
Swap the potato
How well each one fits the dish's main ingredients (flour, egg, lemon, sugar):
- Arrowrootfits better
- Shallotfits better
- Asparagusfits better
- Potatothe original
Fit is the average pairing score against flour, egg, lemon, sugar. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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